Driver distraction is an important cause of motor vehicle crashes.105 Loss of concentration (thinking about other things or daydreaming), adjusting controls for accessories in the car, and being distracted by passengers or people or events outside the car are common causes of driver distraction.106 In research from New South Wales and Western Australia examining driver distraction and road safety, 10% of drivers reported that they had smoked during their most recent driving trip of five minutes or more duration, ahead of 9% who had used mobile telephones and 6% who had eaten while driving.106
An analysis of the US motor vehicle crash data concluded that distraction caused by smoking was thought to be responsible for almost 1% of car crashes over a five-year period between 19951999, or about 12,780 crashes.107 Canadian research has found that smokers are more likely to have a car crash than non-smokers, whether or not they are actually smoking at the time of the incident. The author of this study speculates that as well as the distraction factor, smokers may suffer physiological impairment due to smoking, or that there may underlying behavioural differences between smokers and non-smokers that contribute to the difference in crash data.108 Whatever the explanation, Australian reviews have concluded that smoking while driving increases the risk of having a motor vehicle crash.105, 109
Smokers are also more likely to die from injury in motor vehicle crashes and other types of accidents, including those involving falls, fires and other unintentional injuries.110–112 Possible reasons for this include the effects of smoking on physical performance (such as strength, agility, balance and speed) and recovery from physical trauma (such as post-operative complications and wound healing).112